Back to results
US 5,671,548 AGranted
Three row drying cylinder group
AssigneeVoith Sulzer Papiermaschinen GmbH
InventorsDieter Blaschka, Werner Leitenberger, Andreas Merz
Life of this patent
Estimating the term…
Abstract
A three row drying cylinder group for a drying section of a paper machine or the like. The bottom cylinder row felt only passes through the bottom row. The top cylinder row felt passes from the top row, wraps the first middle row cylinder as a deflection element, passes over the next top row cylinder, and then is guided so that the opposite side of the top felt passes the next middle row cylinder and is guided back to the top row to alternate between the two ways of passing the middle row cylinders. Those middle row cylinders which are deflection elements may be heated or not and may deliver suction or vacuum to hold the web to the felt.
Claims20
A three row drying cylinder group for the drying section of a paper or board or web making machine, the drying cylinder group comprising:
- a top row of drying cylinders, a middle row of drying cylinders having axes below the axes of the top row of cylinders and a bottom row of drying cylinders having axes below the axes of the middle row of drying cylinders;
- a bottom dryer felt, first guide means causing the bottom dryer felt to wrap around at least the bottom of each of the bottom row of drying cylinders for pressing a web against at least the bottoms of the bottom row of drying cylinders;
- a top dryer felt, second guide means causing the top dryer felt to wrap around at least the top of each of the top row of drying cylinders for pressing the web against at least the tops of the top row of drying cylinders;
- a first one of the top and bottom felts wraps the drying cylinders only in the respective first one of the top and bottom rows of drying cylinders without wrapping the drying cylinders in either of the other rows of drying cylinders;
- the second one of the felts wraps all of the cylinders of the respective second one of the top and bottom rows of drying cylinders, and the respective guide means for the second felt guides the second felt to also wrap around at least one of the drying cylinders of the middle row of drying cylinders along the path of the second dryer felt from one of the drying cylinders in the second row of drying cylinders to the next adjacent drying cylinder in the second row of drying cylinders.
2 more elements
A three row drying cylinder group for the drying section of a paper, or board or web making machine, the drying cylinder group comprising:
- a top row of drying cylinders, a middle row of drying cylinders having axes below the axes of the top row of drying cylinders and a bottom row of drying cylinders having axes below the axes of the middle row of drying cylinders;
- first felt guide rolls disposed between adjacent drying cylinders at a first one of the top and bottom rows of drying cylinders;
- a first drying section felt alternately partially wrapping around the outwardly facing side of each drying cylinder of the first one of the rows of drying cylinders, and then wrapping around the oppositely facing side of the adjacent first guide roll between two drying cylinders of the first row of drying cylinders and then wrapping the next adjacent drying cylinder in the first row of drying cylinders followed by the next adjacent first guide roll along the first row of drying cylinders;
- second felt guide rolls between adjacent cylinders in the middle row of drying cylinders;
- a second drying section felt having first and second opposite sides, the second felt first side wrapping partially around the outwardly facing side of a first one of the drying cylinders in the second one of the top and bottom cylinder rows, so that the second felt first side faces toward a first one of the second row of drying cylinders, then the second felt partially wrapping around the side of a first one of the middle row of cylinders away from the second row of cylinders, with the second felt second side facing toward the first one of the middle row of cylinders, then the second felt passing around the outwardly facing side of a second one of the second row of cylinders with the second felt first side facing toward the second one of the second row of cylinders, then the second felt passing around a first one of the guide rolls between the first one of the middle row of cylinders and the adjacent second one of the middle row of cylinders, then the second felt partially wrapping the side of the second one of the middle row of cylinders toward the second row of cylinders, with the second felt first side facing toward the second one of the middle row of cylinders, then the second felt wrapping a second one of the guide rolls adjacent the second one of the middle row of cylinders and then the second felt being guided to wrap partially around the outwardly facing side of a third one of the second row of cylinders which is adjacent the second one of the second row of cylinders, with the second felt first side facing toward the third one of the second row of cylinders.
2 more elements
A three row drying cylinder group for the drying section of a paper, or board or web making machine, the drying cylinder group comprising:
- a top row of drying cylinders, a middle row of drying cylinders having axes below the axes of the top row of cylinders and a bottom row of drying cylinders having axes below the axes of the middle row of drying cylinders;
- a first drying section felt partially wrapping around the outwardly facing side of each drying cylinder of a first one of the top and bottom rows of drying cylinders;
- first felt guide means in the first row of drying cylinders for guiding the first felt to partially wrap around the outwardly facing side of each one of the first row of cylinders;
- a second drying section felt having first and second opposite sides;
- second felt guide means for guiding the second felt to partially wrap over the outwardly facing side of a first cylinder of a second one of the top and bottom rows of drying cylinders;
- then guiding the second felt to pass around the side of a first one of the middle row of cylinders that faces away from the second row of cylinders;
- then guiding the second felt to wrap around the outwardly facing side of a second cylinder of the second row of cylinders adjacent the first cylinder of the second row;
- then guiding the second felt to wrap around a second one of the middle row of cylinders that is adjacent to the first one of the middle row of cylinders, and to wrap around the side of the second one of the middle row of cylinders that faces toward the second row cylinders;
- then guiding the second felt further through the drying group;
- whereby the first side of the second felt wraps the first one of the middle row of cylinders and the second side of the second felt wraps the second one of the middle row of cylinders, while the second side of the second felt also wraps the first and second ones of the second row of cylinders.
7 more elements
Dependencies are inferred from the claim text.